ES530371A0 - Circuito para tratar senales utiles en un video-interlocutor de cuatro conductores. - Google Patents

Circuito para tratar senales utiles en un video-interlocutor de cuatro conductores.

Info

Publication number
ES530371A0
ES530371A0 ES530371A ES530371A ES530371A0 ES 530371 A0 ES530371 A0 ES 530371A0 ES 530371 A ES530371 A ES 530371A ES 530371 A ES530371 A ES 530371A ES 530371 A0 ES530371 A0 ES 530371A0
Authority
ES
Spain
Prior art keywords
interlocutor
drivers
video
circuit
useful signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES530371A
Other languages
English (en)
Other versions
ES8501184A1 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COMELIT COMP ELETTRO IT
COMELIT ELETTRONICA ITALIANA SpA Cia
Original Assignee
COMELIT COMP ELETTRO IT
COMELIT ELETTRONICA ITALIANA SpA Cia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by COMELIT COMP ELETTRO IT, COMELIT ELETTRONICA ITALIANA SpA Cia filed Critical COMELIT COMP ELETTRO IT
Publication of ES530371A0 publication Critical patent/ES530371A0/es
Publication of ES8501184A1 publication Critical patent/ES8501184A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
ES530371A 1983-03-11 1984-03-07 Circuito para tratar senales utiles en un video-interlocutor de cuatro conductores. Expired ES8501184A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT20047/83A IT1160803B (it) 1983-03-11 1983-03-11 Procedimento per trattare i segnali utili in un videocitofono a quattro conduttori e circuiteria relativa

Publications (2)

Publication Number Publication Date
ES530371A0 true ES530371A0 (es) 1984-11-01
ES8501184A1 ES8501184A1 (es) 1984-11-01

Family

ID=11163397

Family Applications (1)

Application Number Title Priority Date Filing Date
ES530371A Expired ES8501184A1 (es) 1983-03-11 1984-03-07 Circuito para tratar senales utiles en un video-interlocutor de cuatro conductores.

Country Status (3)

Country Link
EP (1) EP0121757A1 (es)
ES (1) ES8501184A1 (es)
IT (1) IT1160803B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230473B1 (en) * 1985-06-25 1994-02-09 Matsushita Electric Works, Ltd. Monitoring device applying noctovision for a doorphone system
IT1294377B1 (it) * 1997-04-30 1999-03-24 Bitron Spa Sistema di connessione elettrica per impianti citofonici e/o videocitofonici.
CN103248968B (zh) * 2013-05-21 2016-04-27 广东安居宝数码科技股份有限公司 楼宇传呼的对讲装置、层间设备及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926314A1 (de) * 1969-03-07 1970-11-26 Heider Gmbh Schaltungsanordnung fuer kombinierte Tuersprech- und OEffneranlagen in Mehrwohnungshaeusern
FR2494064B1 (fr) * 1980-11-12 1987-10-23 Pfister Marcel Systeme d'appel selectif pour installations de sonnerie et autres commandes a distance
IT1165528B (it) * 1980-12-15 1987-04-22 Urmet Spa Impianto citofonico con trasmissione di immagine impiegantte quattro conduttori comuni ed un conduttore di selezione per ciascun posto interno

Also Published As

Publication number Publication date
IT8320047A1 (it) 1984-09-11
EP0121757A1 (en) 1984-10-17
IT1160803B (it) 1987-03-11
ES8501184A1 (es) 1984-11-01
IT8320047A0 (it) 1983-03-11

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